And here are some places, just in this blog (while there are other places elsewhere where this annoyance is discussed), where the problems caused by the above titlebar are discussed (and solutions are given, in the first case below):
The NetBeans docs team recently discussed this situation. We came to the conclusion that the "value add" of this titlebar for the NetBeans user is not that great. Not having the "IDE" text in the titlebar would not be a big loss. But, since not having it would be a gain, at the very least one potential annoyance less, for NetBeans Platform developers, we decided to remove it. Hence, the titlebar of the helpset is now, since the last few days in 6.0 dev builds, as follows:
Small change, but a useful one, I think. You might still want to add text, or change text, in the helpset's titlebar. But now the chance that you will have to do so is significantly decreased.